Green’s Dictionary of Slang

vom n.

vomit.

1998		K. Sampson Awaydays 137: Damien [...] finding himself stuck fast, with torrents of vom blowing back in his face.
2000		N. Griffiths Grits 120: The town clock under which Batty nurly choked on is own vom.

In derivatives

vomatose (adj.) [SE vomit + comatose]

(US campus) disgusting.

1983		Eble Campus Sl. Nov. 5: vomatose – really disgusted.
1996		Eble Sl. and Sociability 38: Although blends are fashionable in the marketplace, college slang makes little use of this process of word formation, with only about a dozen examples collected since 1972: [...] vomatose (vomit + comatose) ‘disgusting.’.